|Pennant number|Name|Builder|Laid down|Launched|Completed|Fate|
|---|---|---|---|---|---|---|
|F00|Jervis ‡|Hawthorn Leslie & Company, Hebburn|26 August 1937|9 September 1938|12 May 1939|Sold for scrap 1949|
|F22|Jackal|John Brown & Company, Clydebank|24 September 1937|25 October 1938|31 March 1939|Bombed off Mersa Matruh on 11 May 1942 and scuttled by Jervis following day|
|F34|Jaguar|William Denny & Brothers, Dumbarton|25 November 1937|22 November 1938|12 September 1939|Torpedoed by German U-boat U.652 off Sollum, 26 March 1942|
|F46|Juno (ex-Jamaica)|Fairfield Shipbuilding & Engineering Company, Govan|15 October 1937|8 December 1938|25 August 1939|Bombed and sunk south of Crete, 21 May 1941|
|F53|Janus|Swan Hunter & Wigham Richardson, Wallsend|29 September 1937|11 October 1938|5 August 1939|Torpedoed and sunk off Anzio by German aircraft, 23 January 1944|
|F61|Javelin (ex-Kashmir)|John Brown|11 October 1937|21 December 1938|10 June 1939|Sold for scrap 1949|
|F72|Jersey|J. Samuel White, Cowes|1937|26 September 1938|28 April 1939|Mined off Valletta 2 May 1941, broke in two and sank 2 days later|
|F85|Jupiter|Yarrow & Company, Scotstoun|28 September 1937|27 October 1938|25 June 1939|Hit a Dutch mine during the battle of the Java Sea 27 February 1942 and sank the following day|
|-|Jubilant|-|-|-|-|Ordered March 1937, cancelled December 1937|

Question: how many of these ships were sank?
Answer: 4